What about before 30 years ago and what colour of terrier did your line start then ,,,,,,,,,,, and if your breeding black to black or throwinging in a chocolate now and again and following a line your still fowlding in that original colour that’s why patterdales come in all shapes and form smooths roughs curly coats,,, bully heads snippy heads because there throwing up what put in the past from years gone buy,,,,,,